UST Check → counties → Wisconsin → Monroe

Underground storage tanks & leak sites in Monroe County, WI

Every figure below is from EPA UST Finder — the EPA-compiled national registry of state-reported underground storage tanks — county aggregates as published by EPA.

352registered tank facilities

147open tanks

723closed tanks

173leak incidents on record

8cleanups still open

8 leak cleanups in Monroe County are still open — the state has not closed the case. An open cleanup near a property you're buying or lending on is a findable, checkable fact: it appears in a per-address screen with distance and the registry record.

Largest registered facilities

By open-tank count, from the facility-level registry. Every fact is attributed to the EPA record (linked ID); something wrong — use the correction path in the footer and we'll fix or remove it promptly.

Facility	City	Open / closed tanks	Status	EPA record
Whitetail Crossing Tomah Convenience Store	Tomah	3 / 0	Open UST(s)	HCN5004

Open leak cleanups — most recently reported

Site	City	Reported	Substance	EPA record
DX SERVICE STATION FORMER	NORWALK	2010-10-19	—	WI03-42-556192
LANDMARK PROPERTY	TOMAH	2006-03-20	—	WI03-42-545107
GRACES STORE	SHENNINGTON	1998-10-29	—	WI03-42-204862
CITGO OAKDALE TRAVEL CENTER	OAKDALE	1998-09-22	—	WI03-42-199096
HOLIDAY STATION STORE #150	TOMAH	1998-06-10	—	WI03-42-191264
CLIFTON SERVICE CENTER	CLIFTON	1995-03-21	—	WI03-42-259998

What this means if you're buying or lending here

"Closed" ≠ clean. A closed tank was taken out of service per the registry — many were closed without soil testing, especially before the late 1990s.
The registry is incomplete by design. Tanks removed before 1986 and most residential heating-oil tanks were never registered. A county with 352 registered facilities has an unknown number of unregistered ones.
Open cleanups are the headline. 8 cases in this county are still open; contamination may still be under investigation or remediation — distance from a specific parcel is what matters, and that's a per-address question.

Screen a specific property

This page covers the county. A purchase or loan decision needs the registry around one address: registered tanks at the parcel, every facility within 500 and 1,500 ft, leak cleanups with status and distance — each line cited to the official record.

Screen an address — $49 How it works

This is a screen of EPA-registered tank and leak records, not an environmental site assessment. State registries are incomplete by design: tanks removed before 1986 and most residential heating-oil tanks were never registered, so a clean screen cannot prove the absence of a tank. "Closed" means a tank was taken out of service per the registry — it does not certify that no contamination remains.

source: EPA UST Finder EPA data vintage 2024-12-04 computed 2026-06-12